nur jumaadzan zaleha mamat, saiful hafizah jaaman, rokiah@rozita ahmad.  (2018).  comparisons of investment fund allocation-capacitated vehicle routing problem results: investment fund allocation for different time units.  - proceedings of the 25th national symposium on mathematical sciences.  . 

suhailywati ramli & saiful hafizah jaaman.  (2018).  optimal solution of fuzzy optimization using pentagonal fuzzy numbers.  - proceeding of the 25th national symposium on mathematical sciences (sksm25), aip conference proceeding.  . 

suhailywati ramli & saiful hafizah jaaman.  (2017).  markowitz portfolio optimization model employing fuzzy measure.  - the 4th international conference on mathematical sciences, aip conference proceeding.  1-6. 

siti salihah shaffie, saiful hafizah jaaman & daud mohamad.  (2017).  fuzzy net present valuation based on risk assessment of malaysian infrastructure.  - the 4th international conference on mathematical sciences, aip conference proceeding.  1-9. 

nur jumaadzan zaleha mamat, saiful hafizah jaaman & rokiah rozita ahmad.  (2017).  covariance versus correlation in capacitated vehicle routing problem investment fund allocation problem.  - the 4th international conference on mathematical sciences, aip conference proceedings.  1-7. 

nurfadhlina abdul halim, shar nizam bin sharif, saiful hafizah jaaman sharman.  (2016).  empirical testing of robust optimization profit sharing ratio with straight line depreciation in aitab instrument.  - advances in industrial and applied mathematics, aip conference proceeding.  1-6. 

siti salihah shaffie, saiful hafizah jaaman, daud mohamad.  (2016).  review of capital investment in economic growth cycle.  - the 2016 ukm fst postgraduate colloquium, aip conference proceeding.  1-7. 

siew l.w., jaaman s.h., ismail h..  (2016).  portfolio optimization for index tracking modelling in malaysia stock market.  - aip conference proceedings.  1-5. 

nur jumaadzan zaleha mamat, saiful hafizah jaaman, rokiahrozita ahmad.  (2016).  vehicle routing problem and capacitated vehicle routing problem frameworks in fund allocation problem.  - the 2016 ukm fst postgraduate colloquium, aip conference proceeding.  1-7. 

betty voon wan niu, mohd salmi md noorani, saiful hafizah jaaman.  (2016).  chaotic behavior in malaysian stock market: a study with recurrence quantification analysis.  - the 2016 ukm fst postgraduate colloquium, aip conference proceding.  1-5. 

siti salihah shafie, saiful hafizah jaaman.  (2016).  monte carlo on net present value for capital investment in malaysia.  - procedia social and behavioral sciences.  689-693. 

nurfadhlina abd halim, abd aziz arrashid abd rajak, saiful hafizah jaaman sharman.  (2016).  bai bithaman ajil (bba) modelling by qardhul hasan.  - advances in industrial and applied mathematics, aip conference proceeding.  1-5. 

nur jumaadzan zaleha mamat, saiful hafizah jaaman, rokiah@rozita ahmad.  (2016).  vehicle routing problem, capacitated vehicle routing problem, investment fund allocation.  - the 2016 fst ukm postgraduate colloquium, aip conference publishing.  1-7. 

yulia resti, noriszura ismail, saiful hafizah jaaman.  (2014).  premium analysis for copula model: a case study for malaysian motor insurance claims.  - aip conference proceedings - 3rd international conference on mathematical science.  1072-1077. 

nur jumaadzan zaleha mamat, saiful hafizah jaaman, rokiah rozita ahmad, maslina darus.  (2014).  fund allocation using capacitated vehicle routing problem.  - statistics and operational research international conference (soric 2013).  169 - 179. 

lam weng siew, saiful hafizah hj. jaaman, hamizun bin ismail.  (2014).  portfolio optimization in enhanced index tracking with goal programming approach.  - aip conference proceeding - the 2014 ukm fst postgraduate colloquium.  968-972. 

nur jumaadzan zaleha mamat, saiful hafizah jaaman, rokiah rozita ahmad.  (2014).  optimizing investment fund allocation using vehicle routing problem framework.  - proceedings of the 21st national symposium on mathematical sciences (sksm21).  1166 - 1171. 

nur jumaadzan zaleha mamat, saiful hafizah jaaman and rokiah@rozita ahmad.  (2014).  static vs stochastic optimization: a case study of ftse bursa malaysia sectorial indices.  - aip conference proceedings - 3rd international conference on mathematical sciences.  480-486. 

lam weng siew, saiful hafizah hj. jaaman, hamizun bin ismail.  (2014).  enhanced index tracking modeling in portfolio optimization with mixed-integer programming z approach.  - aip conference proceeding - the 2014 ukm fst postgraduate colloquium.  918-922. 

lam weng siew and saiful hafizah hj. jamaan.  (2013).  comparison between goal programming and cointegration approaches in enhanced index tracking.  - aip conference proceeding - 20th national symposium on mathematical sciences.  . 

lam weng hoe, saiful hafizah hj. jaaman and zaidi isa.  (2013).  portfolio optimization with skewness and kurtosis.  - aip conference proceeding - 20th national symposium on mathematical sciences.  . 

nur jumaadzan zaleha mamat, saiful hafizah jaaman, rokiah @ rozita ahmad and ismail mohd.  (2013).  vehicle routing problem in investment fund allocation.  - aip conference proceeding - 20th national symposium on mathematical sciences.  . 

w.h. lam, saiful hafizah hj. jaaman and zaidi isa.  (2013).  risk modelling in portfolio optimization.  - aip conference proceeding : international conference on mathematical sciences and statistics (icmss2013).  . 

w.s. lam, saiful hafizah hj. jaaman and hamizun bin ismail.  (2013).  enhanced index tracking modelling in portfolio optimization.  - aip conference proceeding : international conference on mathematical sciences and statistics (icmss2013).  . 

rokiah@rozita ahmad, noriza majid, nur jumaadzan zaleha mamat, azmin sham rambely, nora muda, saiful hafizah hj jaaman, nur riza mohd suradi, wan rosmanira ismail, faridatulazna ahmad shahabuddin et a.  (2012).  transformation of language in teaching and learning policy.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

nur riza mohd suradi, norkisme zainal abidin, wan zawiah wan zin, marina zahari, zalina mohd ali, najib mahmood rafee, rokiah@rozita ahmad, azmin sham rambely, noriza majid, nora muda...et.al..  (2012).  transformation of english language as the language of knowledge in ukm teaching and learning : highlights of students` perspectives.  - procedia social and behavior sciences - ukm teaching and learning congress 2011.  . 

nora muda, wan rosmanira ismail, faridatulazna ahmad shahabudin, humaida banu samsudin, nur riza mohd suradi, noriza majid, rokiah @ rozita ahmad, azmin sham rambely, nur jumaadzan zaleha mamat et. al.  (2012).  teaching science and mathematics in english steering mastery in english language amongst sciences students in ukm.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

nurfadhlina abdul halim, saiful hafizah jaaman, noriszura ismail, and rokiah ahmad.  (2012).  profit sharing ratio modeling for islamic hire-purchase contract: robust optimization and chance constraint approach.  - the 5th international conference on research and education in mathematics. aip conf. proc. 2012 american institute of physics.  . 

noriza majid, saiful hafizah jaaman, maslina darus, roslinda mohd nazar, rokiah@rozita ahmad, nora muda, nur riza mohd suradi, azmin sham rambely, ummul khair salma din, wan rosmanira...et.al..  (2012).  transformation of teaching and learning mathematics in english: are the lecturers ready?.  - procedia social and behavioral sciences - ukm teaching and learning congress 2011.  . 

noriza majid, saiful hafizah jaaman, maslina darus, roslinda mohd nazar, siti norafidah mohd ramli, nur riza mohd suradi, azmin sham rambely, rokiah@rozita ahmad, ummul khair salma din, ... et at..  (2011).  the readiness of mathematics and science lecturers to teach in english from students` perspective.  - kongres pengajaran dan pembelajaran ukm 2010; tanjung keling, melaka (procedia social and behavioral sciences).  . 

zaidi isa, abdul malek zakaria, mohd ikhwan azlan, mohd salmi md. noorani, noriza majid, hamizun ismail, saiful afizah jaaman, maslina darus, roslinda mohd nazar, ...et al..  (2011).  students` perceptions of the implementation of teaching and learning of science and mathematics in english.  - kongres pengajaran dan pembelajaran ukm, 2010; tanjung keling, melaka.  . 

wan rosmanira ismail, zainol mustafa, nora muda, norkisme zainal abidin, zaidi isa, abdul malek zakaria, nur riza mohd suradi, nur jumaadzan zaleha mamat, roslinda mohd nazar, zalina mohd ali.  (2011).  students inclination towards english language as medium of instruction in the teaching of science and mathematics.  - kongres pengajaran dan pembelajaran ukm, 2010; tanjung keling, melaka.  . 

zienab ali elshegmani, rokiah @ rozita ahmad, saiful hafizah jaaman & roza hazli zakaria.  (2010).  a new method for transformed continuous arithmetic asian option.  - proceedings of the 2nd international conference on mathematical sciences (icms2 2010), 30 nov. 3 dec 2010, pwtc kuala lumpur.  . 

ng shiu chiet, saiful hafizah jaaman, noriszura ismail & siti mariyam shamsuddin.  (2009).  insolvency prediction model using artificial neural network for malaysian general insurers.  - proceedings of the world congress on nature and biologically inspired computing (nabic09).  .